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Hongkai Wen

23 accepted papers

2026

DynFusion: Rethinking Condition Fusion for Adaptive Multi-Conditional Text-to-Image Generation

CVPR 2026

Text-to-image diffusion models have achieved remarkable progress, generating visually realistic and semantically coherent images from textual prompts. However, natural language alone lacks the precision required for design-centric applications that demand strict spatial and structural fidelity--part

Cited by 0SourceScholar
2026

Learning Effective Sign Features without Text for Gloss-free Sign Language Translation

CVPR 2026

Self-supervised learning (SSL) has achieved remarkable success across both NLP and CV domains. However, sign language translation (SLT) models still heavily rely on gloss annotations in gloss-based SLT or text annotations in gloss-free SLT (GFSLT) during pretraining, aiming to ensure that the backbo

Cited by 0SourceScholar
2026

Omni-fMRI: A Universal Atlas-Free fMRI Foundation Model

ICML 2026poster

Self-supervised fMRI foundation models have shown promising transfer performance, yet most rely on predefined region-level parcellations that discard fine-grained voxel information and introduce atlas-dependent biases. We propose Omni-fMRI, an atlas-free foundation model that operates directly on vo…

Cited by 0SourceScholar
2025

BGM: Demand Prediction for Expanding Bike-Sharing Systems with Dynamic Graph Modeling

IJCAI 2025

Accurate demand prediction is crucial for the equitable and sustainable expansion of bike-sharing systems, which help reduce urban congestion, promote low-carbon mobility, and improve transportation access in underserved areas. However, expanding these systems presents societal challenges, particula

Cited by 0SourcePDFScholar
2025

DCA: Graph-Guided Deep Embedding Clustering for Brain Atlases

NeurIPS 2025poster

Brain atlases are essential for reducing the dimensionality of neuroimaging data and enabling interpretable analysis. However, most existing atlases are predefined, group-level templates with limited flexibility and resolution. We present Deep Cluster Atlas (DCA), a graph-guided deep embedding clust…

Cited by 0SourcecodeScholar
2025

DPaI: Differentiable Pruning at Initialization with Node-Path Balance Principle

ICLR 2025poster

Pruning at Initialization (PaI) is a technique in neural network optimization characterized by the proactive elimination of weights before the network's training on designated tasks. This innovative strategy potentially reduces the costs for training and inference, significantly advancing computatio…

2025

FlexControl: Computation-Aware Conditional Control with Differentiable Router for Text-to-Image Generation

ICML 2025poster

Spatial conditioning control offers a powerful way to guide diffusion‐based generative models. Yet, most implementations (e.g., ControlNet) rely on ad-hoc heuristics to choose which network blocks to control — an approach that varies unpredictably with different tasks. To address this gap, we propos…

2025

High-Fidelity Road Network Generation with Latent Diffusion Models

IJCAI 2025

Road networks are the vein of modern cities. Yet, maintaining up-to-date and accurate road network information is a persistent challenge, especially in areas with rapid urban changes or limited surveying resources. Crowdsourced trajectories, e.g., from GPS records collected by mobile devices and veh

2025

MixSignGraph: A Sign Sequence is Worth Mixed Graphs of Nodes

NeurIPS 2025poster

Recent advances in sign language research have benefited from CNN-based backbones, which are primarily transferred from traditional computer vision tasks (\eg object detection, image recognition). However, these CNN-based backbones usually excel at extracting features like contours and texture, but…

Cited by 0SourcecodeScholar
2025

Shortcutting Pre-trained Flow Matching Diffusion Models is Almost Free Lunch

NeurIPS 2025poster

We present an ultra-efficient post-training method for shortcutting large-scale pre-trained flow matching diffusion models into efficient few-step samplers, enabled by novel velocity field self-distillation. While shortcutting in flow matching, originally introduced by shortcut models, offers flexi…

Cited by 0SourceScholar
2024

SignGraph: A Sign Sequence is Worth Graphs of Nodes

CVPR 2024poster

Despite the recent success of sign language research the widely adopted CNN-based backbones are mainly migrated from other computer vision tasks in which the contours and texture of objects are crucial for identifying objects. They usually treat sign frames as grids and may fail to capture effecti…

2024

Towards Neural Architecture Search through Hierarchical Generative Modeling

ICML 2024poster

Neural Architecture Search (NAS) aims to automate deep neural network design across various applications, while a good search space design is core to NAS performance. A too-narrow search space may fail to cover diverse task requirements, whereas a too-broad one can escalate computational expenses an…

Cited by 0SourcePDFScholar
2023

EV-Eye: Rethinking High-frequency Eye Tracking through the Lenses of Event Cameras

NeurIPS 2023poster

In this paper, we present EV-Eye, a first-of-its-kind large scale multimodal eye tracking dataset aimed at inspiring research on high-frequency eye/gaze tracking. EV-Eye utilizes an emerging bio-inspired event camera to capture independent pixel-level intensity changes induced by eye movements, achi…

2023

Towards Data-Agnostic Pruning At Initialization: What Makes a Good Sparse Mask?

NeurIPS 2023poster

Pruning at initialization (PaI) aims to remove weights of neural networks before training in pursuit of training efficiency besides the inference. While off-the-shelf PaI methods manage to find trainable subnetworks that outperform random pruning, their performance in terms of both accuracy and com…

2023

Zero-Cost Operation Scoring in Differentiable Architecture Search

AAAI 2023technical

We formalize and analyze a fundamental component of dif- ferentiable neural architecture search (NAS): local “opera- tion scoring” at each operation choice. We view existing operation scoring functions as inexact proxies for accuracy, and we find that they perform poorly when analyzed empir- ically…

2022

BLOX: Macro Neural Architecture Search Benchmark and Algorithms

NeurIPS 2022accept

Neural architecture search (NAS) has been successfully used to design numerous high-performance neural networks. However, NAS is typically compute-intensive, so most existing approaches restrict the search to decide the operations and topological structure of a single block only, then the same block…

2020

3DCFS: Fast and Robust Joint 3D Semantic-Instance Segmentation via Coupled Feature Selection

ICRA 2020poster

We propose a novel fast and robust 3D point clouds segmentation framework via coupled feature selection, named 3DCFS, that jointly performs semantic and instance segmentation. Inspired by the human scene perception process, we design a novel coupled feature selection module, named CFSM, that adaptiv…

Cited by 16SourcecodeScholar
2020

Journey Towards Tiny Perceptual Super-Resolution

ECCV 2020poster

Recent works in single-image perceptual super-resolution (SR) have demonstrated unprecedented performance in generating realistic textures by means of deep convolutional networks. However, these convolutional models are large and expensive, preventing them from being deployed to devices that require…

2020

Rebalancing Expanding EV Sharing Systems with Deep Reinforcement Learning

IJCAI 2020poster

Electric Vehicle (EV) sharing systems have recently experienced unprecedented growth across the world. One of the key challenges in their operation is vehicle rebalancing, i.e., repositioning the EVs across stations to better satisfy future user demand. This is particularly challenging in the shared…

2019

EV-Gait: Event-Based Robust Gait Recognition Using Dynamic Vision Sensors

CVPR 2019poster

In this paper, we introduce a new type of sensing modality, the Dynamic Vision Sensors (Event Cameras), for the task of gait recognition. Compared with the traditional RGB sensors, the event cameras have many unique advantages such as ultra low resources consumption, high temporal resolution and muc…

Cited by 186PDFScholar
2017

DeepVO: Towards end-to-end visual odometry with deep Recurrent Convolutional Neural Networks

ICRA 2017poster

This paper studies monocular visual odometry (VO) problem. Most of existing VO algorithms are developed under a standard pipeline including feature extraction, feature matching, motion estimation, local optimisation, etc. Although some of them have demonstrated superior performance, they usually nee…

Cited by 1123SourceScholar
2017

VidLoc: A Deep Spatio-Temporal Model for 6-DoF Video-Clip Relocalization

CVPR 2017poster

Machine learning techniques, namely convolutional neural networks (CNN) and regression forests, have recently shown great promise in performing 6-DoF localization of monocular images. However, in most cases image-sequences, rather only single images, are readily available. To this extent, none of th…

Cited by 325PDFcodeScholar
2016

Keyframe based large-scale indoor localisation using geomagnetic field and motion pattern

IROS 2016poster

This paper studies indoor localisation problem by using low-cost and pervasive sensors. Most of existing indoor localisation algorithms rely on camera, laser scanner, floor plan or other pre-installed infrastructure to achieve sub-meter or sub-centimetre localisation accuracy. However, in some circu…

Cited by 69SourceScholar